JP2001115412A - Paving method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paving device and method capable of high quality construction by effectively putting emulsion to practical use. SOLUTION: In this paving method and device, piled timbers for pavement are supplied and uniformly laid after spraying emulsion to a road face. The emulsion comprises straight asphalt and water mainly at a moisture content ranging from 28 wt.% to 40 wt.% and is sprayed at a temperature ranging from 50 deg.C to 80 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the field of pavement technology for paving asphalt on roads and the like.

[0002]

2. Description of the Related Art Conventionally, this kind of technology has been disclosed in Patent No. 2
As disclosed in Japanese Patent No. 541874 (known example), a technique is known in which a bitumen agent is sprayed on a road surface which has been flattened in advance, and then a pavement material is supplied and spread.

[0003] It is needless to say that the expected road paving work can be sufficiently achieved by the invention of this known example, but it is to be noted that the paving work can be more effectively performed by specifying various conditions of bitumen spraying. It was verified that not only construction work can be performed but also high quality pavement results can be obtained.

[0004]

The problem to be solved by the present invention is to improve the above-mentioned problems in the prior art. The first problem to be solved by the present invention is as follows. It is an object of the present invention to provide a high-quality paving work by specifying the water content and temperature of an emulsion.

A second problem to be solved by the present invention is to provide an emulsion which specifies the amount of emulsion to be sprayed to obtain the same good results as in the preceding paragraph.

A third problem to be solved by the present invention is to provide a device for specifying the vehicle speed of a pavement device so as to obtain the same good results as in the preceding paragraph.

A fourth problem to be solved by the present invention is to provide a device which specifies the height of the spray portion so as to obtain the same good results as in the preceding item.

[0008] A fifth problem to be solved by the present invention is to provide a device which specifies the distance between the spray section and the screw spreader so as to obtain the same good results as in the preceding paragraph.

A sixth problem to be solved by the present invention is to provide a device capable of displaying the status of pavement work so as to avoid occurrence of erroneous operation.

[0010]

Means for solving the above-mentioned problems are as follows.

(1) A method of laying a road surface by spraying an emulsion, then supplying a laying mixture, and laying down the surface to lay the road surface.
A pavement method comprising spraying the emulsion containing a straight asphalt and water as main components at a temperature of 50 ° C. to 80 ° C. on an emulsion having a water content of 28 to 40% by weight.

(2) The paving method according to the above (1), wherein the amount of the emulsion to be sprayed is 0.2 liter / m ^{2 to} 1.2 liter / m ² .

(3) In the paving method according to the above (1) or (2), a vehicle speed of a paving device for transporting the emulsion and the paving mixture is 0 m / min to 10 m / min. Paving method.

(4) The pavement method according to any one of (1) to (3), wherein an interval between a spray portion installed on the pavement device and a road surface is 200 mm to 250 mm. Method.

(5) In the paving method according to any one of the above (1) to (4), the distance between the center of the spray portion and the center of the screw spreader installed on the paving device is 425.
A pavement method characterized in that the thickness is in the range of mm to 1000 mm.

(6) A self-propelled paving device for supplying a paving mixture after spreading the emulsion on a road surface and paving the road surface, wherein the emulsion tank is mounted on a propellable paving device. Is a pavement device provided with an emulsion heating means, and a spray unit for dispersing the emulsion is installed so as to be changeable in position.

Accordingly, high-quality pavement construction can be performed by utilizing the emulsion without wasting it. In particular, in the cutting overlay method, the emulsion spraying step and the curing step can be omitted, so that the construction area is small. The cost can be doubled, resulting in significant cost reduction.

(7) The paving apparatus according to the above (6), further comprising a display unit capable of displaying the temperature of the emulsion, the amount of the supplied emulsion, the position of the spray unit, and the vehicle speed.

Accordingly, the operator can visually check the display section to constantly monitor the work status, and can efficiently complete the pavement work without causing an erroneous operation.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The contents of the present invention will be described below with reference to the drawings showing the embodiments.

1. Pavement device (finisher) 1 (1) Overall configuration Pavement mixture in which asphalt emulsion (emulsion) L is sprayed on a road surface (roadbed, asphalt base layer, etc.) G, and a binder such as asphalt is attached to aggregate on the top. A finisher 1 for laying W receives a paving mixture W from a dump truck or the like (not shown) on a vehicle means 2 capable of changing the propulsion vehicle speed, and drops the mixture on a road surface G from the rear of the finisher 1. And an emulsion supply means 4, a spreading means 5 for spreading the paving mixture W on the road surface G, a central control means 6 capable of controlling each of the above means, and an operation / display means 7. .

Next, each of these means will be described in more detail.

(2) Vehicle means 2 The vehicle means 2 comprises an engine 25 and a mixture transfer means 3 on a frame 24 supported by front wheels 22 and rear wheels 23 which are steered by a handle 21 as shown in FIG. And an emulsion supply means 4, and a central control means 6 and an operation / display panel 71 are provided.

(3) Mixing Material Transfer Means 3 As shown in FIG. 2, the transferring means 3 for the pavement mix W is a pavement mix W dropped from a dump truck into the hopper 31.
A bar feeder 32 is provided to transfer the pavement mixture W from the rear edge of the frame 24 onto the road surface G by driving the bar feeder 32 by driving means (not shown).

(4) Spreading means 5 The spreading means 5 for uniformly spreading the pavement mixture W dropped on the road surface G includes a set of screw spreaders 51 at the rear of the frame 24. , 51 ′ and a screed 52 are provided, and the leveling arm 53 carrying the screed 52 is raised by a hydraulic cylinder 54 with a pivot 53 ′ as a fulcrum, so that the screed 52 can be lifted and moved. The directing direction of the bottom surface of the screed 52 can be adjusted by the tool 55, and the screw spreaders 51 and 51 'are turned by manual operation on the operation / display panel 71 so that the pavement mixture W is appropriately moved in the width direction of the frame 24. The screed 52 is transported, and the directional direction of the screed 52 is changed and adjusted so that the thickness (depth) of the dropped pavement mixture W is uniform and required. Those that can spread leveling to form a Jo.

(5) Emulsion supply means 4 The emulsion supply means 4 comprises an emulsion holding section 400 and an emulsion dispersing section 40.
And each of them will be described below.

Emulsion Holder 400 As shown in FIG. 4, water capable of storing an emulsion obtained by adding a surfactant (emulsifier) to tap water or the like, and an additive such as a water-soluble polymer or oil and fat are mixed. The emulsion L obtained by mixing the asphalt with the straight asphalt is provided with an emulsion tank 420 for injecting the emulsion L from a supply device LD prepared separately. The emulsion tank 420 is provided with an agitator 421 for stirring the emulsion L, The heater 422 (emulsion heating means) can heat the emulsion L, and the thermometer 423 can detect the temperature of the emulsion L.

The temperature of the emulsion L is controlled by a temperature controller 42.
6, the heater 422 can be turned on and off to adjust the temperature. This point can be controlled by connecting the thermometer 423 and the temperature controller 426 to the central control means 6, respectively.

Emulsion dispersing means 40 On the emulsion conduit 42 connecting the emulsion tank 420 and the spray sections 41 and 41 ′, a pump 45 for controlling the supply amount of the emulsion L, a regulating valve 43 and a flow meter 44 are provided. Yes,
It is connected to the central control means 6 via the supply controller 48, so that the amount and timing of the application of the emulsion L in the spray units 41 and 41 'can be controlled.

Further, the spray units 41 and 41 ′
It is desirable that a plurality of finishers be provided at desired intervals in the width direction of the finisher 1 and that they be arranged in a double row in the front-rear direction.

The spray units 41, 41 '
Are provided at the lower part of the frame 24 as shown in FIG.
The first and second fluid drive units 4 are mounted so that the position can be changed up / down and front / back by the fluid drive units 46 and 47 of FIG.
By connecting 6, 47 to the central control means 6,
The operator operates the operation / display panel 71 to appropriately change the position of the spray units 41, 41 'in the height direction and / or the front-rear direction, so that the emulsion L is brought to a required position on the road surface G.
It can be effectively spread on top.

(6) Central control means 6 The central control means 6 has an arithmetic function, a storage function and the like. P. U, and can give a command based on information from each means in response to the operation by the operator.

(7) Operation / Display Unit 7 As shown in FIG. 6, an operation / display panel 71 of the operation / display unit 7 is provided with an operation button unit 72 and a display unit 73 composed of a liquid crystal panel. , Each central control means 6
It is connected to the.

For the emulsion L, the operation button section 72 is provided with an emulsion temperature raising / lowering button 721 and an emulsion supply amount increasing / decreasing button 722.

The display section 73 has an emulsion temperature display section 73.
1. An emulsion supply amount display section 732 is provided.

Further, regarding the spray units 41 and 41 ', a position change button 723 is provided on the operation button unit 72, and a position display unit 733 of the spray units 41 and 41' is provided on the display unit 73.

As for the vehicle speed, the operation button 72 is provided with a vehicle speed change button 724, and the display 73 is provided with a vehicle speed display 734.

The operation and display means 7 will be described later in detail in the method of use.

2. Emulsion L Emulsion L is mainly composed of asphalt and water, and the water contains an amine chloride or an acetate of a fatty acid derivative as a main component. What added the nonionic surfactant which added the oxide was used.

In this case, it is needless to say that the cationic emulsion is used as a prime coat or tack coat for asphalt pavement, and the nonionic emulsion is suitable for road regeneration roadbed because of its good mixing with cement. is there.

Additives such as a fat electrolyte or a water-soluble polymer are added to the asphalt in the emulsion L to stabilize the performance and storage of the emulsion.

In the emulsion L, the performance of quick drying when it is sprayed on the road surface G is changed by changing the water content thereof. Requires about 5 seconds after being sprayed.

For this purpose, the water content of the emulsion L is 2%.
When the amount is less than 8% by weight, the viscosity of the emulsion L is increased, the function of the pump 45 is reduced, and "makimura" is generated. When the amount is more than 40% by weight, the water content becomes too large and the drying time is lengthened. It is necessary that the quick drying property may be reduced, and it is confirmed that the content is preferably 28 to 40% by weight. Emulsion L whose water content has been adjusted in advance is poured into the emulsion tank 420 from the supply device LD. , To be stored.

3. How to use (1) Common pavement procedure When constructing or repairing a road, for example, when repairing an asphalt-paved road, the road surface G is made flat and the paving mixture W is loaded from the dump truck into the hopper of the finisher 1. 31. In this state, the finisher 1 is propelled at a low speed, and the emulsion L is spread on the road surface G. Further, the pavement mixture W in the hopper 31 is sprayed from the rear edge of the frame 24 by the bar feeder 32 to the spray portions 41, 4
Road surface G between 1 'and screw spreader 51, 51'
Let it flow down. Next, the screed 52 spreads the surface flat to form a new pavement layer g, which is pressed by a load roller to complete the asphalt road surface.

Next, the individual operation of each means will be described.

(2) Retention and Spraying of Emulsion Adjusting the Temperature of Emulsion When the temperature of the emulsion L becomes 50 ° C. or lower, the viscosity increases, the operation of the pump 45 becomes poor, and the prescribed emulsion cannot be sprayed. , 85 ° C. or higher, the moisture evaporates and the properties of the emulsion change. Therefore, it is desirable to control the temperature to 50 ° C. to less than 80 ° C., and the temperature of the emulsion L detected by the thermometer 423 is reduced. Temperature display 7
The emulsion L is heated and adjusted to a required temperature by operating the temperature raising / lowering button 721 to turn the heater 422 on and off to appropriately heat the emulsion L.

Adjustment of Emulsion Spray Amount The emulsion supply amount increase / decrease button 722 is operated, the supply controller 48 operates the pump 45 and the adjustment valve 43, and the emulsion L from the emulsion tank 420 is sprayed through the conduit 42 to the spray unit 41. , 41 ′ and sprayed. Since the spraying amount can be detected by the flow meter 44 and visually recognized by the supply amount display unit 732, the operator can timely place the emulsion L on the road surface G without excess or shortage. It can be scattered.

It can be said that the application rate is preferably 0.2 liter / m ^{2 to} 1.2 liter / m ^{2 as} standard.

Adjustment of Position of Spray Unit As shown in FIG. 5, the spray units 41 and 41 ′ are attached to the lower surface of the frame 24 so as to be able to move up and down and move back and forth in the directions of arrows XX ′ and YY ′. 6, the first and second fluid drive units 46 and 47 shown in FIGS. 4 and 5 are operated by operating the position change button 723 shown in FIG.
1 'can be changed, and the position can be displayed on the position display section 733.
When the distance (a) between the center of the spray portion 41 'located on the side closer to the screw spreaders 51 and 51' and the center of the screw spreaders 51 and 51 'is too close to each other, the emulsion L is directly formed. It is scattered on the pavement mixture W and impairs the properties of the pavement mixture W. Also, if you move too far, pivot 5
The leveling arm 53 connecting the 3 'to the screet 52 becomes longer, making it difficult to control the screed 52. Further, if the position of the pivot 53 'is lowered backward, the overall length of the finisher 1 becomes longer, so that there is a limit. Spray unit 41, 4
1 'height (b), the distance to the road surface G is 200mm ~
250 mm is preferable, and if this interval is too large, the emulsion L
It has been confirmed that the particles are scattered, and that if too small, the spread of the spray becomes insufficient.

The vehicle speed of the finisher 1 can be adjusted by a vehicle speed change button 724 shown in FIG. 6 and can be visually recognized on the display unit 734. To evaporate the water in the emulsion L instantly, Since it takes about 5 seconds, and at least 3 seconds, it is desirable that the speed of the finisher 1 be 0 m / min to 10 m / min.

As described above, the desired paving treatment is performed by adjusting the temperature and the water content of the emulsion L, and spraying a desired supply amount from the spraying unit onto the road surface G at a required distance, while propelling the finisher 1. Can be completed automatically.

[0052]

The specific effects of the present invention described above are as follows.

High quality paving work can be expected.

The emulsion can be effectively utilized without wasting.

An erroneous operation can be avoided.

The cost can be reduced by shortening the construction.

[Brief description of the drawings]

FIG. 1 is a side view of a paving device according to an embodiment.

FIG. 2 is a plan view of FIG. 1;

FIG. 3 is a partially enlarged view of a main part of FIG. 1;

FIG. 4 is a functional block diagram of FIG. 1;

FIG. 5 is an explanatory view of a spray unit in FIG. 1;

FIG. 6 is an explanatory diagram of an operation / display unit in FIG. 1;

[Explanation of symbols]

 L Emulsion W Paving mixture 1 Paving device (finisher) 41, 41 'Spraying section 51, 51' Screw spreader

Claims (7)

[Claims] Claims: 1. A pavement method in which an emulsion is spread on a road surface, a pavement mixture is supplied, and the road surface is paved by leveling, wherein the emulsion is mainly composed of straight asphalt and water, and has a water content of A pavement method, wherein the temperature of the emulsion having a ratio of 28 to 40% by weight is 50 ° C to 80 ° C, and the emulsion is sprayed on a road surface. 2. The paving method according to claim 1, wherein
A pavement method, wherein the amount of the emulsion to be sprayed is 0.2 l / m ^{2 to} 1.2 l / m ² . 3. The paving method according to claim 1, wherein a speed of a paving device for transporting the emulsion and the paving mixture is 0 m / min to 10 m / min. 4. The pavement method according to claim 1, wherein a distance between a spray portion installed on the pavement device and a road surface is 200 mm to 250 mm. 5. The paving method according to claim 1, wherein the distance between the center of the spray portion and the center of the screw spreader installed on the paving device is 425.
A pavement method characterized in that the thickness is in the range of mm to 1000 mm. 6. A self-propelled paving device for laying a road surface by spraying an emulsion on a road surface, supplying a paving mixture, and laying down the road surface, wherein an emulsion tank mounted on a propellable paving device is provided. A pavement device comprising an emulsion heating means, and a spray unit for dispersing the emulsion being installed so as to be changeable in position. 7. The paving device according to claim 6, wherein
A pavement device comprising a display unit for displaying the temperature of the emulsion, the supply amount of the emulsion, the position of the spray unit, and the vehicle speed.